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Connecticut Statewide LiDAR 2016
FGDC Metadata
DescriptionSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut Statewide LiDAR 2016
Originators: Capitol Region Council of Governments
Publisher: Capitol Region Council of Governments
Publication place: Connecticut
Publication date: 2016
Edition: 1.0
Data type: vector digital data
Data location: http://crcog.org
Description
A characterization of the data, including its intended use and limitations.
Abstract: 
This metadata record describes the 1 foot contour data used for the 2016 Connecticut LiDAR project covering approximately 5240 square miles.
Purpose: 
To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments, and hydrologic modeling. LAS and bare earth DEM data products are suitable for 1 foot contour generation.  USGS LiDAR Base Specification 1.2, QL2. 19.6 cm NVA.
Supplemental information: 
Project Projection, Datums and Units.  Projection - State Plane Connecticut.  Horizontal datum - North American Datum of 1983 (NAD83 (2011)).  Vertical datum - North American Vertical Datum of 1988 (NAVD88) using the latest geoid (Geoid12b) for converting ellipsoidal heights to orthometric heights.  Units - US feet
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Person: Erik D. Snowden
Organization: Capitol Region Council of Governments
Position: IT/GIS Coordinator
Phone: 860.522.2217 x217
Fax: 860.724.1274
Email: esnowden@crcog.org
Hours of service: 8:00 AM - 5:00 PM
Address type: mailing and physical address
Address: 
241 Main Street
City: Hartford
State or Province: CT
Postal code: 06106
Country: U.S.A.
Data Type
How the data are represented, formatted and maintained by the data producing organization.
Data type: vector digital data
Native dataset environment: Microsoft Windows 7; ESRI ArcCatalog 9.3.1.1850
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 20160311
Ending date: 20160416
Currentness reference: 
ground condition
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: Unknown
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: LiDAR, mapping, point cloud, Ground points, Unclassified points, Water points, Overlap points, ALS70, Intensity return, LAS, Digital Elevation Model (DEM), Digital Terrain Model (DTM), IMG, Grid, Bare Earth, First Return, Contour, hydro-flattening
Keyword thesaurus: CT
Place:
Keywords: Connecticut, Block 7
Keyword thesaurus: CT
Temporal:
Keywords: 2016
Keyword thesaurus: none
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints: 
This data may be used by the requested party for stated purposes and may be re-distributed.
Use constraints: 
This data is for planning purposes only and should not be used for legal or cadastral purposes. Any conclusions drawn from analysis of this information are not the responsibility of Sanborn Map Company. Users should be aware that temporal changes may have occurred since this dataset was collected and some parts of this dataset may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations.

Contact:
State of Connecticut
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Coordinate System Details
Grid coordinate system
Grid coordinate system name: State Plane Coordinate System 1983
State Plane Coordinate System:
SPCS xone identifier: 0600
Lambert Conformal Conic:
Standard parallel: 41.2
Standard parallel: 41.8666666666667
Longitude of central meridian: -72.75
Latitude of projection origin: 40.8333333333333
False easting: 999999.999996
False northing: 499999.999998
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.01
Ordinate resolution: 0.01
Planar distance units: survey feet
Geodetic model
Horizontal datum name: North American Datum of 1983 (2011)
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222101004
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude datum name: North American Vertical Datum of 1988(GEOID12b)
Altitude resolution: 0.1
Altitude distance units: feet
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Unprojected coordinates (geographic)
BoundaryCoordinate
West -73.745809 (longitude)
East -71.782632 (longitude)
North 42.063615 (latitude)
South 40.971166 (latitude)
+ Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview: 
1 foot contours
Entity and attribute detailed citation: 
USGS Base Specification 1.2,  QL2 meeting 19.6 cm NVA
Direct spatial reference method: Vector
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report: 
Data covers the boundary extents provided for the project.
Completeness report: 
A visual qualitative assessment was performed in the source Lidar dataset.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report: 
N/A
Attribute accuracy assessment:
Accuracy values
0
Explanation: 
N/A
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report: 
N/A
Horizontal positional accuracy assessment:
Accuracy values
0
Explanation: 
N/A
Vertical accuracy report: 
N/A
Vertical positional accuracy assessment:
Accuracy values
0
Explanation: 
N/A
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
TLDEF
Title: Tile Definition
Originators: Sanborn Map Company Inc.
Publication date: Unpublished material
Edition: 1.0
Data type: Vector digital data
Map scale denominator: 1200
Media: disk
Source contribution: 
The tile definition defines discreet non-overlapping rectangular areas used as cut lines to break up the large classified lidar dataset into smaller, more manageable data tiles.  Each tile is 2500 X 2500 feet in dimension.
Date: 2016
Currentness reference: 
ground condition
GDB
Title: Contour Geodatabase
Originators: Sanborn Map Company, Inc.
Publication date: Unpublished Material
Edition: 1.0
Data type: ESRI geodatabase
Map scale denominator: 1200
Media: disk
Source contribution: 
Terrain geodatabase comprised of lidar bare earth DEM and hydrologic breaklines used to derive 1 foot contours.
Date: 2016
Currentness reference: 
ground condition
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description: 
At selected locations throughout the site, accurate GPS coordinates and elevations are surveyed and the points are marked with targets.
Process date: 2016
Data Source used
None
Data Source produced
CONT
Process Step 2
Process description: 
New LiDAR data is captured for the project area using a Leica ALS70 LiDAR instrument an integrated IPAS20 GPS/INS system mounted within a Aero Commander twin engine airplane.
Process date: 2016
Data Source used
None
Data Source produced
LIDAR, GPS_RAW
Process Step 3
Process description: 
The airborne GPS data is post-processed in Inertial Explorer software and LEICACloudPro software to determine the LiDAR sensor's angle and orientation in the terrain (project) coordinate system and datums during the survey.
Process date: 2016
Data Source used
GPS_RAW
Data Source produced
GPS_SOL
Process Step 4
Process description: 
The georeferenced lidar data is then classified and edited in Terrasolid Terrascan software.  Data is classified to produce:  Class 1:  unclassified,  Class 2:  ground,  Class 7:  low point,  Class 9: water,  Class 10: ignored ground, Class 17: bridge deck,  Class 18: high noise.
Process date: 2016
Data Source used
CONT, GPS_SOL, LIDAR
Data Source produced
LAS
Process Step 5
Process description: 
Classified Contour Keypoints from LiDAR and hydro-flattened breaklines were used to create a terrain to generate of 1 foot contours.  Smoothing was applied to the contours for more aesthetically pleasing contours without affecting accuracy of the contours.  The contour data was cut into tiles for topology corrections.  The contour data was then subjected to manual quality control review by Sanborn including checking for tile edge matching.
Process date: 2016
Data Source used
GDB,CONT
Data Source produced
LAS
+ Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description: 
Connecticut 2016 LiDAR project
Distribution liability: 
The Capitol Region Council of Governments digital data have been tested and their documentation carefully reviewed.  However, the Capitol Region Council of Governments and its representatives make no warranty or representation, either expressed or implied, with respect to the digital data and their documentation, their quality, performance, merchantability, or fitness for a particular purpose.  The digital data are distributed on "as is" basis, and the user assumes all risk to their quality, the results obtained from their use, and the performance of the data.  In no event will the Capitol Region Council of Governments or its representatives be liable for any direct, indirect, special, incidental or consequential damages resulting from and defect in the State of Connecticut or in their documentation.  This disclaimer of warranty is exclusive and in lieu of all others, oral or written, express or implied.  No agent or employee is authorized to make any modification, extension, or addition to this warranty.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Person: Erik D. Snowden
Organization: Capitol Region Council of Governments
Position: IT/GIS Coordinator
Phone: 860.522.2217 x217
Fax: 860.724.1274
Email: esnowden@crcog.org
Hours of service: 8:00 AM - 5:00 PM
Address type: mailing and physical address
Address: 
241 Main Street
City: Hartford
State or Province: CT
Postal code: 06106
Country: U.S.A.
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: Geodatabase
Transfer size: 6
Digital transfer option:
Online option:
Computer information:
Network address:
Network resource name: crcog.org
Access instructions: unknown
Fees: unknown
Ordering instructions: 
Capitol Region Council of Governments
Turnaround: unknown
Available Time Period
Time when data is available from the distributer.
Date: 2016
+ Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 2016
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Person: Shawn Benham
Organization: Sanborn Map Co
Position: Project Manager
Phone: 719.502-1296
Email: sbenham@sanborn.com
Hours of service: 8:00 AM - 5:00 PM
Address type: mailing address
Address: 
1935 Jamboree Dr
City: Colorado Springs
State or Province: CO
Postal code: 80920
Country: U.S.A.
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC CSDGM
Standard version: FGDC-STD-001-1998
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.3
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
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Federal Geographic Data Committee